Device for alternating atomizer-pressures.



N. MGGARTY.

DEVICE FOR ALTERNATING ATOMIZBR PRESSURES.

APPLIUATION FILED JUNE 28, 1909.

966,581. Patented Aug. 9, 1910.

I (about 500 lbs.) has UNITED STATES PATENT OFFICE.

NORMAN mocAn'rm'f or.INnIANAroI'.Is, INDIANA, AssIGNon 'ro INDIANA, A conronArIo or INDIANA.

or INDIANAPOLIS,

A'rLAs ENG NE wonxs,

DEVICE For. AL'rnnNA'rine AromrznIt-rnnssonns.

Specification of Letters Patent. Application filed June 28, 1909. Serial No. 504,780.

To all vwhom it may concern: 4

Be it known that I, NORMAN MoGARirY, a citizen of the United States Indianapolis in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Devices for Alternating Atomizer-Pressures, of which the following'is a specification- In the operation of internal combustion engines, of the non-explosion type, liquidfuel is injected into the combustion chamber at a' time when a considerable pressure been developed in the combustion chamber, and it has heretofore been quite common to accomplish this injection of fuel by' means of an atomizer supplied with air under about 1000 lbs. so that,

when the atomizer valve is opened, the excessive air pressure delivered to the atomizer, is capable of forcin the liquid fuel into the combustion cham er. In such an apparatus mechanism needs to be provided to'force the liquid into the atomizer structure against'the air pressure which, is maintained therein and therefore in the pumping mechanisms heretofore commonly in use, it is difiicult to provide means for auto- I matically varying the quantity of liquid discharge to the atomizer in order to properly supply the motor with the amount of fuel necessary to carry the existing load on the motor. I have therefore conceived a new method of,and apparatus for, introducing liquid 'fuelinto the co tially in vertica jecting means of imfiroved method.

the motor by first bringing-the liquid fuel to the point of injection under conditions pressure u on the mechanism used to transport the el, subsequently exerting upon the charge of fuel a large pressure sufl'icient to produce injection thereof into the combustion chamber but under conditions which will not affect the fuel deliverin =mechanism, and then withdrawing or s'u stantially reducing the pressure inthe injecting means in order to facilitate the delivery to the ina new supply of fuel.

The accompan in'g' drawing,

pable of carrying out commercially my b the drawinfgs 10,'indicates=the combustlon chamber 0 a motor and; 11 indicates the atomizer structure of practically" standresiding at difler from structures now common bustion chamber of I or material .a d arrange an exhaust which is parsection; illustrates an ap paratus embodying my invention and ca! ard construction, having a valve-seat member 12 which communicates with the combustion chamber 10. Seated in seat 12 is a needle valve 13 which is normally held to its seat by a considerable pressure exerted by spring 14. The needle valve 13 lies within a tube 15 around which is formed an annular chamber 16 which. delivers through small atomizing openings 17 to the valvese'a t 12 Leading into chamber 16, through a passage 18 near the'lower end of the chamber, is a fuel pipe 19' andleading into the upper end of the chamber through a passage 21, is an air inlet 22.

- The needle valve 13 is intermittently moved from its seat b means of an arm 23carried by a rock shaft 24 to which is connected a lever 25 engagin a cam 26 carried by a shaft 27 operate in any suitable manner the motor.- Thus far the structure does not materially in use. In the structures-commonly in use, however, the air inlet 22 is directly connected with a supply pipe 31 so that a continuous pressure is mai tained within the chamber 16. In the present form, I arrange, between pipe 31 and pipe 22, a valve 32 which is normally held closed by a spring 33 so' as to normally prevent any passage of air from the supply pipe31 to the pipe 22. Valve 32 may be intermittently moved fromv its seat by a lever with an eccentric strap 36' mounted upon an eccentric 37 carried byshaft 27. In or- Patented Aug. 9, 1910.

said atomized structure 34 connected'by a link 35 der that there may be times when there'is I no material pressure within chamber '16 I l d an exhaust passage 41 from pipe 22 valve 42 to coop- Valve 42 1s normally held ofa spring. 43 one end erate therewith. to its seatby means of which engages the valve and the other end {of which engages a collar 44 loosely mounted 01f the valve stem and continuously in, engagement with an arm 45 connected with the lever 34; Arm 45 is also capable ofz-engaging a collar 46 secured to the outer end of the stern-of valve 42, .the arrangement being suchthat arm 45 may have a' limited playrelative to the valve stem but at all times, except when it engages collar 46, serve to. compress spring 43 and thus force the valve 42 to' its seat to close passage 41. v g Y Any suitable means may be provided for a present drawings I have shown a pump delivering uniform, or variably measured, quantities of liquid to pipe 19. Inb the 0 y 51 into which. is projected a disp acing lun war. y, relative to the chamber, by means of a spring 54 engaging a head 55 on the outer end of the plunger. The plunger 1s moved inwardly through its displacm movement bymeans of a lever 56 connecte to the eccentric strap 36 and, in order that .this lever may have a variable effect upon the plunger 53 and thus deliver variably measured quantities of liquid from the pum chamber, I pivot lever 56 upon an eccentric 57 carried by a rock shaft 58 and connect said rock shaft with a speed controlled governor 59 so that the governor will operate 56 will operate upon thus relieving to shift the eccentric 57 and thus move the lever 56 toward and from the head 55 and thus vary the time during which the lever head 55 and thus vary the stroke of the plunger 53. Leading into 'chamber 52 is a supply pipe 61, in which is "a suitable and usua vmwar ly opening check valve 62,. and arranged between the pump chamber 52 and fuel pipe 19 is an outwardly opening check valve 63 of the usual form.

he operation is as follows: A suitable airpressure is maintained within pipe 31 and rotation of shaft 27 in the direction in dicated by the arrow will swing lever 56 so as to rmit spring 54 to retract plunger 53 and t us permit oil or other fuel to flow into pump chamber 52. At the same time valve 42 is held. firmly to its seat'so' as to prevent any escape of air from passage 41 and valve 32 is withdrawn from its seat so as to permit the high pressure air'to 'flow from pipe 31 through pipe 22 into chamber rive the liquid therein through passages 17 to valve seat 12. At the same time arm 23 serves to withdraw the needle valve '15 from its seat and permit the liquid to driven into chamber 10. Immediatelv thereafter valve 32 is to its seat and, imme iately after it has returned to its seat, arm 45 engages collar 46 and withdraws valve 42 .from its seat so as .to 0 en a communication through -passage 41 om chamber 16 to atmosphere, the pressure within chamber 16, and thereby relieves any undue loading on the governor, due to Thereupon lever 56 engages head 55 so as to drlve plunger 53 inwardly, and force a measured quantity vof liquid from pump chamber'52 past valve 63 into pipe 19, an equal "quantity of oil'flowing from said pipe into chamber 16 of the atomizer.

to be exerte upon plunger 53. Thereupon .85 plunger 53 starts upon its return movement, I

r 53 which is normally urged outwhen the valve is rmitted to returh atomizer pressure.

This flow takes place at a time when therev is onlyvalve 42 is returned to its seat, valve 32 is withdrawn from its seat, andthe charge of liquid delivered to chamber 16 is driven into chamber 10 by the next charge of high pressure air received from pipe 31.

It will be noticed that the center of eccentric 57 is between the center of shaft 58 and that end of lever 56 which engages head 7 55 sothat the comparatively small movement will produce a larger of the governor 59 lever relative to the movement of the head 55.

I claim as my invention: 1

1. The combination withan internal combustion en ine, of a fuel chamber communi eating wit the combustion chamber of the engine, a valve arranged between said fuel chamber and combustion chamber, means for intermittently opening and closing saidvalve, a constant high pressure air su ply connecting with the fuel chamber be 1nd the valve, means for injecting successive quantities of fuel into the fuel chamber behind the valve, and means for intermittently connecting and disconnecting the fuel chamber with the air supply to cause an injection of the fuel from the fuel chamber into the combustion chamber when the valve is open.-

2.. The combination with an internal combustion engine, of a fuel chamber communieating with the combustion chamber of the engine, a valve arranged between. said fuel chamber and combustion chamber, means for intermittently opening and closing said valve, a constant hi h pressure-air su(pply connecting with the final chamber behin the valve, means for injecting successive variably measured quantitiesof fuel into the fuel chamber behind the'valve, and means .for intermittently connecting and disconnecting the fuel chamber with the air supply to cause an injection of the fuel from the. the combustion chamber fuel chamber intoopen.

- 3. The combination with an-intemal combustion engine, of a fuel chamber communieating with the combustion chamber. of the engine, a valve arranged betweensaid fuel chamber and combustion chamber, means for intermittently opening and closing said valve, a constant hi h pressureair suppl connecting with the valve, means for injecting successive quanuel chamber behind the tities of fuel into the file chamber behind I the valve, and means for nectin and disconnecting the fuel chamber with t e air supply to cause an injection of the fuel from the fuel chamber into the combustion chamber when the valve is open, and for intermittently connecting the:- fuel chamber with atmosphere when the valve is closed.

4.- The combination bustion en ine, of a eating with intermittently confuel chamber com-muniwith an internal comthe combustion chamber of the v 'engine, a valve arrangedbetween said fuel chamber and combustion chamber, means-for I intermittently opening and closing said h pressure air su .ply el chamber behin the successive vavalve, a constant connectlng with the valve, means for in ectmg for intermittently connecting and 'disconnecting the fuel chamber with the air sup 1y to cause an injection of the fuel from the el chamber into the combustion chamber when the valve is open, and for intermittently connecting the fuel chamber with atmosphere when the valve is closed.

5. The combination with an internal combustion engine, of an atomizerstructure defuelto the atomizer through said pipe, an air pipe leading into the atomizer chamber, I a valve arranged in said air pipe, an .ex-vv 'liveringthereto, means for intermittently operating the valve of said atomizer, a fuel pipe leadinginto said atomizer, means for delivering successive quantities of liquld haust valve leading from said air pipe, and means for intermittently alternately actuating said valves, for the purpose set forth.

6. Thecombination with an internal combustion engine, of an atomizer structure deliverin'g thereto, means for intermittentlyoperating the valve of said atomizer, a fuel pipe leading'into said atomizer, a pump delivering to said fuel pipe, speed controlled means automatically varying successive deliveries from said pum ,an air pipe leadin' into the atomizer cham r, avalve arrange,

insaid air pipe, an exhaust valve leading from said [air pipe, and means for intermittently alternately actuating said valves,

I 4 0 for the purpose set forth.

That improvement in the art of deliv-.

ering liquid fuel to an internal combustion enine, which consists in delivering to an in ection point, communicable with the combustion chamber but disconnected therefrom at the time vof such delivery, successive I quantities of'liqu'id fuel; subsequntly exerting upon said liquid fuel a fluid pressure combustion chamber, whereby the liquid-- fuelis injectedginjto the combustion chamber, and subsequently withdrawing the .injection pressure from the injection point.

8. That improvement in the art of delivering liquid fuel to an internal combustion engine, which consists in delivering to an injection point, communicable with the combustion chamber but disconnected therefrom at the time of such delivery, variable measuredwsuccessive-quantitiesmf liqu' e1; subsequently exerting upon said liquid fuel a fluid pressure in excess of the-fluid pressure within the combustion chamber; opening; communication between the injection point and the combustion chamber, whereby the liquid fuel is injected into-,the combustion chamber; and subsequently withdrawing the injection-pressure from the injection point. a

- In witness whereof, I, have hereunto set my hand and seal at Indianapolis, Indiana, this twenty-second day ofJune, A. D. one thousand 'nine hundred and nine. A

NORMAN McCARTY. [Ia-5.]

1 Witnesses: ARTHUR M. Hoon,

" THOMAS W.- McMmns. 

